A Charlotte Hall man and a Chaptico woman were arrested last week and released on bond after St. Mary’s grand jurors indicted them on robbery, assault and theft charges from a holdup last month at a convenience store in Mechanicsville.

Daniel Warren Kamperin, 22, originally was arrested on district court charges a week after the Sept. 16 robbery that St. Mary’s detectives report occurred early that morning at the 7-Eleven business. Released on $5,000 bond after his arrest, Kamperin turned himself in when he learned of the indictment, his public defender said during a hearing Thursday in circuit court.

“The defendant before the court is the most serious actor” in the crime, St. Mary’s State’s Attorney Richard Fritz (R) said, alleging that Kamperin was the person who went into the store and committed the robbery while threatening an employee with a hammer.

Grand jurors also charged Stevie Rae Koncen, 20, with robbing, assaulting and stealing from Cindy McCarson. Koncen was released last week on $5,000 bond after her arrest on an indictment.

Fritz said in court of the female suspect, “She has a substantial drug problem.”

Judge David W. Densford allowed Thursday that Kamperin also remain on pretrial release on $5,000 bond.

“The allegation is you jumped over a counter and threatened a woman with a hammer to get money,” the judge said. “That concerns me greatly.”

Fritz cautioned that he did not want Kamperin to “put any pressure” on Koncen while they are awaiting trial in the case. Densford allowed that Kamperin can be in Koncen’s presence when she is giving birth to their child.